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80629b1b EZ |
1 | /* Memory attributes support, for GDB. |
2 | Copyright 2001 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
29e57380 C |
21 | #include "defs.h" |
22 | #include "command.h" | |
23 | #include "gdbcmd.h" | |
24 | #include "memattr.h" | |
25 | #include "target.h" | |
26 | #include "value.h" | |
27 | #include "language.h" | |
28 | #include "gdb_string.h" | |
29 | ||
30 | /* FIXME: While this conflicts with the enum defined in breakpoint.h, | |
31 | I used them to be consistant with how breakpoints, tracepoints, and | |
32 | displays are implemented. It doesn't lose now because breakpoint.h | |
33 | is not included. */ | |
34 | enum enable | |
35 | { | |
36 | disabled, | |
37 | enabled | |
38 | }; | |
39 | ||
40 | const struct mem_attrib default_mem_attrib = | |
41 | { | |
42 | MEM_RW, /* mode */ | |
43 | MEM_WIDTH_UNSPECIFIED, | |
44 | false, /* hwbreak */ | |
45 | false, /* cache */ | |
46 | false /* verify */ | |
47 | }; | |
48 | ||
49 | static struct mem_region *mem_region_chain = NULL; | |
f4d650ec | 50 | static int mem_number = 0; |
29e57380 C |
51 | |
52 | static struct mem_region * | |
53 | create_mem_region (CORE_ADDR lo, CORE_ADDR hi, | |
54 | const struct mem_attrib *attrib) | |
55 | { | |
3172dc30 | 56 | struct mem_region *n, *new; |
29e57380 C |
57 | |
58 | if (lo > hi) | |
59 | { | |
60 | printf_unfiltered ("invalid memory region\n"); | |
61 | return NULL; | |
62 | } | |
63 | ||
64 | n = mem_region_chain; | |
65 | while (n) | |
66 | { | |
67 | /* overlapping node */ | |
68 | if ((lo >= n->lo && lo <= n->hi) || | |
69 | (hi >= n->lo && hi <= n->hi)) | |
70 | { | |
71 | printf_unfiltered ("overlapping memory region\n"); | |
72 | return NULL; | |
73 | } | |
2ed3d0b5 | 74 | n = n->next; |
29e57380 C |
75 | } |
76 | ||
77 | new = xmalloc (sizeof (struct mem_region)); | |
78 | new->lo = lo; | |
79 | new->hi = hi; | |
80 | new->number = ++mem_number; | |
81 | new->status = enabled; | |
82 | new->attrib = *attrib; | |
83 | ||
84 | /* link in new node */ | |
85 | new->next = mem_region_chain; | |
86 | mem_region_chain = new; | |
87 | ||
88 | return new; | |
89 | } | |
90 | ||
91 | static void | |
92 | delete_mem_region (struct mem_region *m) | |
93 | { | |
f4d650ec | 94 | xfree (m); |
29e57380 C |
95 | } |
96 | ||
97 | /* | |
98 | * Look up the memory region cooresponding to ADDR. | |
99 | */ | |
100 | struct mem_region * | |
101 | lookup_mem_region (CORE_ADDR addr) | |
102 | { | |
103 | static struct mem_region region; | |
104 | struct mem_region *m; | |
105 | CORE_ADDR lo; | |
106 | CORE_ADDR hi; | |
107 | ||
108 | /* First we initialize LO and HI so that they describe the entire | |
109 | memory space. As we process the memory region chain, they are | |
110 | redefined to describe the minimal region containing ADDR. LO | |
111 | and HI are used in the case where no memory region is defined | |
112 | that contains ADDR. If a memory region is disabled, it is | |
113 | treated as if it does not exist. */ | |
114 | ||
115 | lo = (CORE_ADDR) 0; | |
116 | hi = (CORE_ADDR) ~ 0; | |
117 | ||
118 | for (m = mem_region_chain; m; m = m->next) | |
119 | { | |
120 | if (m->status == enabled) | |
121 | { | |
122 | if (addr >= m->lo && addr < m->hi) | |
123 | return m; | |
124 | ||
125 | if (addr >= m->hi && lo < m->hi) | |
126 | lo = m->hi; | |
127 | ||
128 | if (addr <= m->lo && hi > m->lo) | |
129 | hi = m->lo; | |
130 | } | |
131 | } | |
132 | ||
133 | /* Because no region was found, we must cons up one based on what | |
134 | was learned above. */ | |
135 | region.lo = lo; | |
136 | region.hi = hi; | |
137 | region.attrib = default_mem_attrib; | |
138 | return ®ion; | |
139 | } | |
140 | \f | |
141 | ||
142 | static void | |
143 | mem_command (char *args, int from_tty) | |
144 | { | |
145 | CORE_ADDR lo, hi; | |
146 | char *tok; | |
147 | struct mem_attrib attrib; | |
148 | ||
149 | if (!args) | |
150 | error_no_arg ("No mem"); | |
151 | ||
152 | tok = strtok (args, " \t"); | |
153 | if (!tok) | |
154 | error ("no lo address"); | |
155 | lo = parse_and_eval_address (tok); | |
156 | ||
157 | tok = strtok (NULL, " \t"); | |
158 | if (!tok) | |
159 | error ("no hi address"); | |
160 | hi = parse_and_eval_address (tok); | |
161 | ||
162 | attrib = default_mem_attrib; | |
163 | while ((tok = strtok (NULL, " \t")) != NULL) | |
164 | { | |
165 | if (strcmp (tok, "rw") == 0) | |
166 | attrib.mode = MEM_RW; | |
167 | else if (strcmp (tok, "ro") == 0) | |
168 | attrib.mode = MEM_RO; | |
169 | else if (strcmp (tok, "wo") == 0) | |
170 | attrib.mode = MEM_WO; | |
171 | ||
172 | else if (strcmp (tok, "8") == 0) | |
173 | attrib.width = MEM_WIDTH_8; | |
174 | else if (strcmp (tok, "16") == 0) | |
175 | { | |
176 | if ((lo % 2 != 0) || (hi % 2 != 0)) | |
177 | error ("region bounds not 16 bit aligned"); | |
178 | attrib.width = MEM_WIDTH_16; | |
179 | } | |
180 | else if (strcmp (tok, "32") == 0) | |
181 | { | |
182 | if ((lo % 4 != 0) || (hi % 4 != 0)) | |
183 | error ("region bounds not 32 bit aligned"); | |
184 | attrib.width = MEM_WIDTH_32; | |
185 | } | |
186 | else if (strcmp (tok, "64") == 0) | |
187 | { | |
188 | if ((lo % 8 != 0) || (hi % 8 != 0)) | |
189 | error ("region bounds not 64 bit aligned"); | |
190 | attrib.width = MEM_WIDTH_64; | |
191 | } | |
192 | ||
193 | #if 0 | |
194 | else if (strcmp (tok, "hwbreak") == 0) | |
195 | attrib.hwbreak = true; | |
196 | else if (strcmp (tok, "swbreak") == 0) | |
197 | attrib.hwbreak = false; | |
198 | #endif | |
199 | ||
200 | else if (strcmp (tok, "cache") == 0) | |
201 | attrib.cache = true; | |
202 | else if (strcmp (tok, "nocache") == 0) | |
203 | attrib.cache = false; | |
204 | ||
205 | #if 0 | |
206 | else if (strcmp (tok, "verify") == 0) | |
207 | attrib.verify = true; | |
208 | else if (strcmp (tok, "noverify") == 0) | |
209 | attrib.verify = false; | |
210 | #endif | |
211 | ||
212 | else | |
213 | error ("unknown attribute: %s", tok); | |
214 | } | |
215 | ||
216 | create_mem_region (lo, hi, &attrib); | |
217 | } | |
218 | \f | |
219 | ||
220 | static void | |
221 | mem_info_command (char *args, int from_tty) | |
222 | { | |
223 | struct mem_region *m; | |
224 | struct mem_attrib *attrib; | |
225 | ||
226 | if (!mem_region_chain) | |
227 | { | |
228 | printf_unfiltered ("There are no memory regions defined.\n"); | |
229 | return; | |
230 | } | |
231 | ||
232 | printf_filtered ("Memory regions now in effect:\n"); | |
233 | for (m = mem_region_chain; m; m = m->next) | |
234 | { | |
235 | printf_filtered ("%d: %c\t", | |
236 | m->number, | |
237 | m->status ? 'y' : 'n'); | |
238 | printf_filtered ("%s - ", | |
239 | local_hex_string_custom ((unsigned long) m->lo, "08l")); | |
240 | printf_filtered ("%s\t", | |
241 | local_hex_string_custom ((unsigned long) m->hi, "08l")); | |
242 | ||
243 | /* Print a token for each attribute. | |
244 | ||
245 | * FIXME: Should we output a comma after each token? It may | |
246 | * make it easier for users to read, but we'd lose the ability | |
247 | * to cut-and-paste the list of attributes when defining a new | |
248 | * region. Perhaps that is not important. | |
249 | * | |
250 | * FIXME: If more attributes are added to GDB, the output may | |
251 | * become cluttered and difficult for users to read. At that | |
252 | * time, we may want to consider printing tokens only if they | |
253 | * are different from the default attribute. */ | |
254 | ||
255 | attrib = &m->attrib; | |
256 | switch (attrib->mode) | |
257 | { | |
258 | case MEM_RW: | |
259 | printf_filtered ("rw "); | |
260 | break; | |
261 | case MEM_RO: | |
262 | printf_filtered ("ro "); | |
263 | break; | |
264 | case MEM_WO: | |
265 | printf_filtered ("wo "); | |
266 | break; | |
267 | } | |
268 | ||
269 | switch (attrib->width) | |
270 | { | |
271 | case MEM_WIDTH_8: | |
272 | printf_filtered ("8 "); | |
273 | break; | |
274 | case MEM_WIDTH_16: | |
275 | printf_filtered ("16 "); | |
276 | break; | |
277 | case MEM_WIDTH_32: | |
278 | printf_filtered ("32 "); | |
279 | break; | |
280 | case MEM_WIDTH_64: | |
281 | printf_filtered ("64 "); | |
282 | break; | |
283 | case MEM_WIDTH_UNSPECIFIED: | |
284 | break; | |
285 | } | |
286 | ||
287 | #if 0 | |
288 | if (attrib->hwbreak) | |
289 | printf_filtered ("hwbreak"); | |
290 | else | |
291 | printf_filtered ("swbreak"); | |
292 | #endif | |
293 | ||
294 | if (attrib->cache) | |
295 | printf_filtered ("cache "); | |
296 | else | |
297 | printf_filtered ("nocache "); | |
298 | ||
299 | #if 0 | |
300 | if (attrib->verify) | |
301 | printf_filtered ("verify "); | |
302 | else | |
303 | printf_filtered ("noverify "); | |
304 | #endif | |
305 | ||
306 | printf_filtered ("\n"); | |
307 | ||
308 | gdb_flush (gdb_stdout); | |
309 | } | |
310 | } | |
311 | \f | |
312 | ||
313 | /* Enable the memory region number NUM. */ | |
314 | ||
315 | static void | |
316 | mem_enable (int num) | |
317 | { | |
318 | struct mem_region *m; | |
319 | ||
320 | for (m = mem_region_chain; m; m = m->next) | |
321 | if (m->number == num) | |
322 | { | |
323 | m->status = enabled; | |
324 | return; | |
325 | } | |
326 | printf_unfiltered ("No memory region number %d.\n", num); | |
327 | } | |
328 | ||
329 | static void | |
330 | mem_enable_command (char *args, int from_tty) | |
331 | { | |
332 | char *p = args; | |
333 | char *p1; | |
334 | int num; | |
335 | struct mem_region *m; | |
336 | ||
337 | dcache_invalidate (target_dcache); | |
338 | ||
339 | if (p == 0) | |
340 | { | |
341 | for (m = mem_region_chain; m; m = m->next) | |
342 | m->status = enabled; | |
343 | } | |
344 | else | |
345 | while (*p) | |
346 | { | |
347 | p1 = p; | |
348 | while (*p1 >= '0' && *p1 <= '9') | |
349 | p1++; | |
350 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
351 | error ("Arguments must be memory region numbers."); | |
352 | ||
353 | num = atoi (p); | |
354 | mem_enable (num); | |
355 | ||
356 | p = p1; | |
357 | while (*p == ' ' || *p == '\t') | |
358 | p++; | |
359 | } | |
360 | } | |
361 | \f | |
362 | ||
363 | /* Disable the memory region number NUM. */ | |
364 | ||
365 | static void | |
366 | mem_disable (int num) | |
367 | { | |
368 | struct mem_region *m; | |
369 | ||
370 | for (m = mem_region_chain; m; m = m->next) | |
371 | if (m->number == num) | |
372 | { | |
373 | m->status = disabled; | |
374 | return; | |
375 | } | |
376 | printf_unfiltered ("No memory region number %d.\n", num); | |
377 | } | |
378 | ||
379 | static void | |
380 | mem_disable_command (char *args, int from_tty) | |
381 | { | |
382 | char *p = args; | |
383 | char *p1; | |
384 | int num; | |
385 | struct mem_region *m; | |
386 | ||
387 | dcache_invalidate (target_dcache); | |
388 | ||
389 | if (p == 0) | |
390 | { | |
391 | for (m = mem_region_chain; m; m = m->next) | |
392 | m->status = disabled; | |
393 | } | |
394 | else | |
395 | while (*p) | |
396 | { | |
397 | p1 = p; | |
398 | while (*p1 >= '0' && *p1 <= '9') | |
399 | p1++; | |
400 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
401 | error ("Arguments must be memory region numbers."); | |
402 | ||
403 | num = atoi (p); | |
404 | mem_disable (num); | |
405 | ||
406 | p = p1; | |
407 | while (*p == ' ' || *p == '\t') | |
408 | p++; | |
409 | } | |
410 | } | |
411 | ||
412 | /* Clear memory region list */ | |
413 | ||
414 | static void | |
415 | mem_clear (void) | |
416 | { | |
417 | struct mem_region *m; | |
418 | ||
419 | while ((m = mem_region_chain) != 0) | |
420 | { | |
421 | mem_region_chain = m->next; | |
422 | delete_mem_region (m); | |
423 | } | |
424 | } | |
425 | ||
426 | /* Delete the memory region number NUM. */ | |
427 | ||
428 | static void | |
429 | mem_delete (int num) | |
430 | { | |
431 | struct mem_region *m1, *m; | |
432 | ||
433 | if (!mem_region_chain) | |
434 | { | |
435 | printf_unfiltered ("No memory region number %d.\n", num); | |
436 | return; | |
437 | } | |
438 | ||
439 | if (mem_region_chain->number == num) | |
440 | { | |
441 | m1 = mem_region_chain; | |
442 | mem_region_chain = m1->next; | |
443 | delete_mem_region (m1); | |
444 | } | |
445 | else | |
446 | for (m = mem_region_chain; m->next; m = m->next) | |
447 | { | |
448 | if (m->next->number == num) | |
449 | { | |
450 | m1 = m->next; | |
451 | m->next = m1->next; | |
452 | delete_mem_region (m1); | |
453 | break; | |
454 | } | |
455 | } | |
456 | } | |
457 | ||
458 | static void | |
459 | mem_delete_command (char *args, int from_tty) | |
460 | { | |
461 | char *p = args; | |
462 | char *p1; | |
463 | int num; | |
464 | ||
465 | dcache_invalidate (target_dcache); | |
466 | ||
467 | if (p == 0) | |
468 | { | |
469 | if (query ("Delete all memory regions? ")) | |
470 | mem_clear (); | |
471 | dont_repeat (); | |
472 | return; | |
473 | } | |
474 | ||
475 | while (*p) | |
476 | { | |
477 | p1 = p; | |
478 | while (*p1 >= '0' && *p1 <= '9') | |
479 | p1++; | |
480 | if (*p1 && *p1 != ' ' && *p1 != '\t') | |
481 | error ("Arguments must be memory region numbers."); | |
482 | ||
483 | num = atoi (p); | |
484 | mem_delete (num); | |
485 | ||
486 | p = p1; | |
487 | while (*p == ' ' || *p == '\t') | |
488 | p++; | |
489 | } | |
490 | ||
491 | dont_repeat (); | |
492 | } | |
493 | \f | |
494 | void | |
495 | _initialize_mem () | |
496 | { | |
497 | add_com ("mem", class_vars, mem_command, | |
498 | "Define attributes for memory region."); | |
499 | ||
500 | add_cmd ("mem", class_vars, mem_enable_command, | |
501 | "Enable memory region.\n\ | |
502 | Arguments are the code numbers of the memory regions to enable.\n\ | |
503 | Do \"info mem\" to see current list of code numbers.", &enablelist); | |
504 | ||
505 | add_cmd ("mem", class_vars, mem_disable_command, | |
506 | "Disable memory region.\n\ | |
507 | Arguments are the code numbers of the memory regions to disable.\n\ | |
508 | Do \"info mem\" to see current list of code numbers.", &disablelist); | |
509 | ||
510 | add_cmd ("mem", class_vars, mem_delete_command, | |
511 | "Delete memory region.\n\ | |
512 | Arguments are the code numbers of the memory regions to delete.\n\ | |
513 | Do \"info mem\" to see current list of code numbers.", &deletelist); | |
514 | ||
515 | add_info ("mem", mem_info_command, | |
516 | "Memory region attributes"); | |
517 | } |